Lines Matching +full:ti +full:- +full:sci
1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
18 #include <linux/backing-dev.h>
82 * wrapper functions of stage count (nilfs_sc_info->sc_stage.scnt). Users of
90 static inline void nilfs_sc_cstage_inc(struct nilfs_sc_info *sci) in nilfs_sc_cstage_inc() argument
92 sci->sc_stage.scnt++; in nilfs_sc_cstage_inc()
93 trace_nilfs2_collection_stage_transition(sci); in nilfs_sc_cstage_inc()
96 static inline void nilfs_sc_cstage_set(struct nilfs_sc_info *sci, int next_scnt) in nilfs_sc_cstage_set() argument
98 sci->sc_stage.scnt = next_scnt; in nilfs_sc_cstage_set()
99 trace_nilfs2_collection_stage_transition(sci); in nilfs_sc_cstage_set()
102 static inline int nilfs_sc_cstage_get(struct nilfs_sc_info *sci) in nilfs_sc_cstage_get() argument
104 return sci->sc_stage.scnt; in nilfs_sc_cstage_get()
139 ((__s32)(a) - (__s32)(b) >= 0))
142 struct nilfs_transaction_info *ti) in nilfs_prepare_segment_lock() argument
144 struct nilfs_transaction_info *cur_ti = current->journal_info; in nilfs_prepare_segment_lock()
148 if (cur_ti->ti_magic == NILFS_TI_MAGIC) in nilfs_prepare_segment_lock()
149 return ++cur_ti->ti_count; in nilfs_prepare_segment_lock()
157 save = current->journal_info; in nilfs_prepare_segment_lock()
159 if (!ti) { in nilfs_prepare_segment_lock()
160 ti = kmem_cache_alloc(nilfs_transaction_cachep, GFP_NOFS); in nilfs_prepare_segment_lock()
161 if (!ti) in nilfs_prepare_segment_lock()
162 return -ENOMEM; in nilfs_prepare_segment_lock()
163 ti->ti_flags = NILFS_TI_DYNAMIC_ALLOC; in nilfs_prepare_segment_lock()
165 ti->ti_flags = 0; in nilfs_prepare_segment_lock()
167 ti->ti_count = 0; in nilfs_prepare_segment_lock()
168 ti->ti_save = save; in nilfs_prepare_segment_lock()
169 ti->ti_magic = NILFS_TI_MAGIC; in nilfs_prepare_segment_lock()
170 current->journal_info = ti; in nilfs_prepare_segment_lock()
175 * nilfs_transaction_begin - start indivisible file operations.
177 * @ti: nilfs_transaction_info
188 * the outermost call. If a pre-allocated struct is given to @ti, it is used
197 * %-ENOMEM - Insufficient memory available.
199 * %-ENOSPC - No space left on device
202 struct nilfs_transaction_info *ti, in nilfs_transaction_begin() argument
206 int ret = nilfs_prepare_segment_lock(sb, ti); in nilfs_transaction_begin()
212 trace_ti = current->journal_info; in nilfs_transaction_begin()
215 trace_ti->ti_count, trace_ti->ti_flags, in nilfs_transaction_begin()
222 nilfs = sb->s_fs_info; in nilfs_transaction_begin()
223 down_read(&nilfs->ns_segctor_sem); in nilfs_transaction_begin()
225 up_read(&nilfs->ns_segctor_sem); in nilfs_transaction_begin()
226 ret = -ENOSPC; in nilfs_transaction_begin()
230 trace_ti = current->journal_info; in nilfs_transaction_begin()
231 trace_nilfs2_transaction_transition(sb, trace_ti, trace_ti->ti_count, in nilfs_transaction_begin()
232 trace_ti->ti_flags, in nilfs_transaction_begin()
237 ti = current->journal_info; in nilfs_transaction_begin()
238 current->journal_info = ti->ti_save; in nilfs_transaction_begin()
239 if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) in nilfs_transaction_begin()
240 kmem_cache_free(nilfs_transaction_cachep, ti); in nilfs_transaction_begin()
246 * nilfs_transaction_commit - commit indivisible file operations.
258 struct nilfs_transaction_info *ti = current->journal_info; in nilfs_transaction_commit() local
259 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_transaction_commit()
262 BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); in nilfs_transaction_commit()
263 ti->ti_flags |= NILFS_TI_COMMIT; in nilfs_transaction_commit()
264 if (ti->ti_count > 0) { in nilfs_transaction_commit()
265 ti->ti_count--; in nilfs_transaction_commit()
266 trace_nilfs2_transaction_transition(sb, ti, ti->ti_count, in nilfs_transaction_commit()
267 ti->ti_flags, TRACE_NILFS2_TRANSACTION_COMMIT); in nilfs_transaction_commit()
270 if (nilfs->ns_writer) { in nilfs_transaction_commit()
271 struct nilfs_sc_info *sci = nilfs->ns_writer; in nilfs_transaction_commit() local
273 if (ti->ti_flags & NILFS_TI_COMMIT) in nilfs_transaction_commit()
274 nilfs_segctor_start_timer(sci); in nilfs_transaction_commit()
275 if (atomic_read(&nilfs->ns_ndirtyblks) > sci->sc_watermark) in nilfs_transaction_commit()
276 nilfs_segctor_do_flush(sci, 0); in nilfs_transaction_commit()
278 up_read(&nilfs->ns_segctor_sem); in nilfs_transaction_commit()
279 trace_nilfs2_transaction_transition(sb, ti, ti->ti_count, in nilfs_transaction_commit()
280 ti->ti_flags, TRACE_NILFS2_TRANSACTION_COMMIT); in nilfs_transaction_commit()
282 current->journal_info = ti->ti_save; in nilfs_transaction_commit()
284 if (ti->ti_flags & NILFS_TI_SYNC) in nilfs_transaction_commit()
286 if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) in nilfs_transaction_commit()
287 kmem_cache_free(nilfs_transaction_cachep, ti); in nilfs_transaction_commit()
294 struct nilfs_transaction_info *ti = current->journal_info; in nilfs_transaction_abort() local
295 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_transaction_abort()
297 BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); in nilfs_transaction_abort()
298 if (ti->ti_count > 0) { in nilfs_transaction_abort()
299 ti->ti_count--; in nilfs_transaction_abort()
300 trace_nilfs2_transaction_transition(sb, ti, ti->ti_count, in nilfs_transaction_abort()
301 ti->ti_flags, TRACE_NILFS2_TRANSACTION_ABORT); in nilfs_transaction_abort()
304 up_read(&nilfs->ns_segctor_sem); in nilfs_transaction_abort()
306 trace_nilfs2_transaction_transition(sb, ti, ti->ti_count, in nilfs_transaction_abort()
307 ti->ti_flags, TRACE_NILFS2_TRANSACTION_ABORT); in nilfs_transaction_abort()
309 current->journal_info = ti->ti_save; in nilfs_transaction_abort()
310 if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) in nilfs_transaction_abort()
311 kmem_cache_free(nilfs_transaction_cachep, ti); in nilfs_transaction_abort()
317 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_relax_pressure_in_lock()
318 struct nilfs_sc_info *sci = nilfs->ns_writer; in nilfs_relax_pressure_in_lock() local
320 if (sb_rdonly(sb) || unlikely(!sci) || !sci->sc_flush_request) in nilfs_relax_pressure_in_lock()
323 set_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags); in nilfs_relax_pressure_in_lock()
324 up_read(&nilfs->ns_segctor_sem); in nilfs_relax_pressure_in_lock()
326 down_write(&nilfs->ns_segctor_sem); in nilfs_relax_pressure_in_lock()
327 if (sci->sc_flush_request && in nilfs_relax_pressure_in_lock()
328 test_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags)) { in nilfs_relax_pressure_in_lock()
329 struct nilfs_transaction_info *ti = current->journal_info; in nilfs_relax_pressure_in_lock() local
331 ti->ti_flags |= NILFS_TI_WRITER; in nilfs_relax_pressure_in_lock()
332 nilfs_segctor_do_immediate_flush(sci); in nilfs_relax_pressure_in_lock()
333 ti->ti_flags &= ~NILFS_TI_WRITER; in nilfs_relax_pressure_in_lock()
335 downgrade_write(&nilfs->ns_segctor_sem); in nilfs_relax_pressure_in_lock()
339 struct nilfs_transaction_info *ti, in nilfs_transaction_lock() argument
342 struct nilfs_transaction_info *cur_ti = current->journal_info; in nilfs_transaction_lock()
343 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_transaction_lock()
344 struct nilfs_sc_info *sci = nilfs->ns_writer; in nilfs_transaction_lock() local
347 ti->ti_flags = NILFS_TI_WRITER; in nilfs_transaction_lock()
348 ti->ti_count = 0; in nilfs_transaction_lock()
349 ti->ti_save = cur_ti; in nilfs_transaction_lock()
350 ti->ti_magic = NILFS_TI_MAGIC; in nilfs_transaction_lock()
351 current->journal_info = ti; in nilfs_transaction_lock()
354 trace_nilfs2_transaction_transition(sb, ti, ti->ti_count, in nilfs_transaction_lock()
355 ti->ti_flags, TRACE_NILFS2_TRANSACTION_TRYLOCK); in nilfs_transaction_lock()
357 down_write(&nilfs->ns_segctor_sem); in nilfs_transaction_lock()
358 if (!test_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags)) in nilfs_transaction_lock()
361 nilfs_segctor_do_immediate_flush(sci); in nilfs_transaction_lock()
363 up_write(&nilfs->ns_segctor_sem); in nilfs_transaction_lock()
367 ti->ti_flags |= NILFS_TI_GC; in nilfs_transaction_lock()
369 trace_nilfs2_transaction_transition(sb, ti, ti->ti_count, in nilfs_transaction_lock()
370 ti->ti_flags, TRACE_NILFS2_TRANSACTION_LOCK); in nilfs_transaction_lock()
375 struct nilfs_transaction_info *ti = current->journal_info; in nilfs_transaction_unlock() local
376 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_transaction_unlock()
378 BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); in nilfs_transaction_unlock()
379 BUG_ON(ti->ti_count > 0); in nilfs_transaction_unlock()
381 up_write(&nilfs->ns_segctor_sem); in nilfs_transaction_unlock()
382 current->journal_info = ti->ti_save; in nilfs_transaction_unlock()
384 trace_nilfs2_transaction_transition(sb, ti, ti->ti_count, in nilfs_transaction_unlock()
385 ti->ti_flags, TRACE_NILFS2_TRANSACTION_UNLOCK); in nilfs_transaction_unlock()
388 static void *nilfs_segctor_map_segsum_entry(struct nilfs_sc_info *sci, in nilfs_segctor_map_segsum_entry() argument
392 struct nilfs_segment_buffer *segbuf = sci->sc_curseg; in nilfs_segctor_map_segsum_entry()
393 unsigned int blocksize = sci->sc_super->s_blocksize; in nilfs_segctor_map_segsum_entry()
396 if (unlikely(ssp->offset + bytes > blocksize)) { in nilfs_segctor_map_segsum_entry()
397 ssp->offset = 0; in nilfs_segctor_map_segsum_entry()
398 BUG_ON(NILFS_SEGBUF_BH_IS_LAST(ssp->bh, in nilfs_segctor_map_segsum_entry()
399 &segbuf->sb_segsum_buffers)); in nilfs_segctor_map_segsum_entry()
400 ssp->bh = NILFS_SEGBUF_NEXT_BH(ssp->bh); in nilfs_segctor_map_segsum_entry()
402 p = ssp->bh->b_data + ssp->offset; in nilfs_segctor_map_segsum_entry()
403 ssp->offset += bytes; in nilfs_segctor_map_segsum_entry()
408 * nilfs_segctor_reset_segment_buffer - reset the current segment buffer
409 * @sci: nilfs_sc_info
411 static int nilfs_segctor_reset_segment_buffer(struct nilfs_sc_info *sci) in nilfs_segctor_reset_segment_buffer() argument
413 struct nilfs_segment_buffer *segbuf = sci->sc_curseg; in nilfs_segctor_reset_segment_buffer()
421 err = nilfs_segbuf_reset(segbuf, flags, sci->sc_seg_ctime, sci->sc_cno); in nilfs_segctor_reset_segment_buffer()
425 sumbh = NILFS_SEGBUF_FIRST_BH(&segbuf->sb_segsum_buffers); in nilfs_segctor_reset_segment_buffer()
426 sumbytes = segbuf->sb_sum.sumbytes; in nilfs_segctor_reset_segment_buffer()
427 sci->sc_finfo_ptr.bh = sumbh; sci->sc_finfo_ptr.offset = sumbytes; in nilfs_segctor_reset_segment_buffer()
428 sci->sc_binfo_ptr.bh = sumbh; sci->sc_binfo_ptr.offset = sumbytes; in nilfs_segctor_reset_segment_buffer()
429 sci->sc_blk_cnt = sci->sc_datablk_cnt = 0; in nilfs_segctor_reset_segment_buffer()
434 * nilfs_segctor_zeropad_segsum - zero pad the rest of the segment summary area
435 * @sci: segment constructor object
437 * nilfs_segctor_zeropad_segsum() zero-fills unallocated space at the end of
440 static void nilfs_segctor_zeropad_segsum(struct nilfs_sc_info *sci) in nilfs_segctor_zeropad_segsum() argument
444 ssp = sci->sc_blk_cnt > 0 ? &sci->sc_binfo_ptr : &sci->sc_finfo_ptr; in nilfs_segctor_zeropad_segsum()
445 if (ssp->offset < ssp->bh->b_size) in nilfs_segctor_zeropad_segsum()
446 memset(ssp->bh->b_data + ssp->offset, 0, in nilfs_segctor_zeropad_segsum()
447 ssp->bh->b_size - ssp->offset); in nilfs_segctor_zeropad_segsum()
450 static int nilfs_segctor_feed_segment(struct nilfs_sc_info *sci) in nilfs_segctor_feed_segment() argument
452 sci->sc_nblk_this_inc += sci->sc_curseg->sb_sum.nblocks; in nilfs_segctor_feed_segment()
453 if (NILFS_SEGBUF_IS_LAST(sci->sc_curseg, &sci->sc_segbufs)) in nilfs_segctor_feed_segment()
454 return -E2BIG; /* in nilfs_segctor_feed_segment()
458 nilfs_segctor_zeropad_segsum(sci); in nilfs_segctor_feed_segment()
459 sci->sc_curseg = NILFS_NEXT_SEGBUF(sci->sc_curseg); in nilfs_segctor_feed_segment()
460 return nilfs_segctor_reset_segment_buffer(sci); in nilfs_segctor_feed_segment()
463 static int nilfs_segctor_add_super_root(struct nilfs_sc_info *sci) in nilfs_segctor_add_super_root() argument
465 struct nilfs_segment_buffer *segbuf = sci->sc_curseg; in nilfs_segctor_add_super_root()
468 if (segbuf->sb_sum.nblocks >= segbuf->sb_rest_blocks) { in nilfs_segctor_add_super_root()
469 err = nilfs_segctor_feed_segment(sci); in nilfs_segctor_add_super_root()
472 segbuf = sci->sc_curseg; in nilfs_segctor_add_super_root()
474 err = nilfs_segbuf_extend_payload(segbuf, &segbuf->sb_super_root); in nilfs_segctor_add_super_root()
476 segbuf->sb_sum.flags |= NILFS_SS_SR; in nilfs_segctor_add_super_root()
484 struct nilfs_sc_info *sci, const struct nilfs_segsum_pointer *ssp, in nilfs_segctor_segsum_block_required() argument
487 unsigned int blocksize = sci->sc_super->s_blocksize; in nilfs_segctor_segsum_block_required()
490 return ssp->offset + binfo_size + in nilfs_segctor_segsum_block_required()
491 (!sci->sc_blk_cnt ? sizeof(struct nilfs_finfo) : 0) > in nilfs_segctor_segsum_block_required()
495 static void nilfs_segctor_begin_finfo(struct nilfs_sc_info *sci, in nilfs_segctor_begin_finfo() argument
498 sci->sc_curseg->sb_sum.nfinfo++; in nilfs_segctor_begin_finfo()
499 sci->sc_binfo_ptr = sci->sc_finfo_ptr; in nilfs_segctor_begin_finfo()
501 sci, &sci->sc_binfo_ptr, sizeof(struct nilfs_finfo)); in nilfs_segctor_begin_finfo()
503 if (NILFS_I(inode)->i_root && in nilfs_segctor_begin_finfo()
504 !test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags)) in nilfs_segctor_begin_finfo()
505 set_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags); in nilfs_segctor_begin_finfo()
509 static void nilfs_segctor_end_finfo(struct nilfs_sc_info *sci, in nilfs_segctor_end_finfo() argument
517 if (sci->sc_blk_cnt == 0) in nilfs_segctor_end_finfo()
522 if (test_bit(NILFS_I_GCINODE, &ii->i_state)) in nilfs_segctor_end_finfo()
523 cno = ii->i_cno; in nilfs_segctor_end_finfo()
524 else if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) in nilfs_segctor_end_finfo()
527 cno = sci->sc_cno; in nilfs_segctor_end_finfo()
529 finfo = nilfs_segctor_map_segsum_entry(sci, &sci->sc_finfo_ptr, in nilfs_segctor_end_finfo()
531 finfo->fi_ino = cpu_to_le64(inode->i_ino); in nilfs_segctor_end_finfo()
532 finfo->fi_nblocks = cpu_to_le32(sci->sc_blk_cnt); in nilfs_segctor_end_finfo()
533 finfo->fi_ndatablk = cpu_to_le32(sci->sc_datablk_cnt); in nilfs_segctor_end_finfo()
534 finfo->fi_cno = cpu_to_le64(cno); in nilfs_segctor_end_finfo()
536 segbuf = sci->sc_curseg; in nilfs_segctor_end_finfo()
537 segbuf->sb_sum.sumbytes = sci->sc_binfo_ptr.offset + in nilfs_segctor_end_finfo()
538 sci->sc_super->s_blocksize * (segbuf->sb_sum.nsumblk - 1); in nilfs_segctor_end_finfo()
539 sci->sc_finfo_ptr = sci->sc_binfo_ptr; in nilfs_segctor_end_finfo()
540 sci->sc_blk_cnt = sci->sc_datablk_cnt = 0; in nilfs_segctor_end_finfo()
543 static int nilfs_segctor_add_file_block(struct nilfs_sc_info *sci, in nilfs_segctor_add_file_block() argument
552 segbuf = sci->sc_curseg; in nilfs_segctor_add_file_block()
554 sci, &sci->sc_binfo_ptr, binfo_size); in nilfs_segctor_add_file_block()
555 if (segbuf->sb_sum.nblocks + required + 1 > segbuf->sb_rest_blocks) { in nilfs_segctor_add_file_block()
556 nilfs_segctor_end_finfo(sci, inode); in nilfs_segctor_add_file_block()
557 err = nilfs_segctor_feed_segment(sci); in nilfs_segctor_add_file_block()
563 nilfs_segctor_zeropad_segsum(sci); in nilfs_segctor_add_file_block()
568 if (sci->sc_blk_cnt == 0) in nilfs_segctor_add_file_block()
569 nilfs_segctor_begin_finfo(sci, inode); in nilfs_segctor_add_file_block()
571 nilfs_segctor_map_segsum_entry(sci, &sci->sc_binfo_ptr, binfo_size); in nilfs_segctor_add_file_block()
574 sci->sc_blk_cnt++; in nilfs_segctor_add_file_block()
582 static int nilfs_collect_file_data(struct nilfs_sc_info *sci, in nilfs_collect_file_data() argument
587 err = nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); in nilfs_collect_file_data()
591 err = nilfs_segctor_add_file_block(sci, bh, inode, in nilfs_collect_file_data()
594 sci->sc_datablk_cnt++; in nilfs_collect_file_data()
598 static int nilfs_collect_file_node(struct nilfs_sc_info *sci, in nilfs_collect_file_node() argument
602 return nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); in nilfs_collect_file_node()
605 static int nilfs_collect_file_bmap(struct nilfs_sc_info *sci, in nilfs_collect_file_bmap() argument
610 return nilfs_segctor_add_file_block(sci, bh, inode, sizeof(__le64)); in nilfs_collect_file_bmap()
613 static void nilfs_write_file_data_binfo(struct nilfs_sc_info *sci, in nilfs_write_file_data_binfo() argument
618 sci, ssp, sizeof(*binfo_v)); in nilfs_write_file_data_binfo()
619 *binfo_v = binfo->bi_v; in nilfs_write_file_data_binfo()
622 static void nilfs_write_file_node_binfo(struct nilfs_sc_info *sci, in nilfs_write_file_node_binfo() argument
627 sci, ssp, sizeof(*vblocknr)); in nilfs_write_file_node_binfo()
628 *vblocknr = binfo->bi_v.bi_vblocknr; in nilfs_write_file_node_binfo()
639 static int nilfs_collect_dat_data(struct nilfs_sc_info *sci, in nilfs_collect_dat_data() argument
644 err = nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); in nilfs_collect_dat_data()
648 err = nilfs_segctor_add_file_block(sci, bh, inode, sizeof(__le64)); in nilfs_collect_dat_data()
650 sci->sc_datablk_cnt++; in nilfs_collect_dat_data()
654 static int nilfs_collect_dat_bmap(struct nilfs_sc_info *sci, in nilfs_collect_dat_bmap() argument
658 return nilfs_segctor_add_file_block(sci, bh, inode, in nilfs_collect_dat_bmap()
662 static void nilfs_write_dat_data_binfo(struct nilfs_sc_info *sci, in nilfs_write_dat_data_binfo() argument
666 __le64 *blkoff = nilfs_segctor_map_segsum_entry(sci, ssp, in nilfs_write_dat_data_binfo()
668 *blkoff = binfo->bi_dat.bi_blkoff; in nilfs_write_dat_data_binfo()
671 static void nilfs_write_dat_node_binfo(struct nilfs_sc_info *sci, in nilfs_write_dat_node_binfo() argument
676 nilfs_segctor_map_segsum_entry(sci, ssp, sizeof(*binfo_dat)); in nilfs_write_dat_node_binfo()
677 *binfo_dat = binfo->bi_dat; in nilfs_write_dat_node_binfo()
701 struct address_space *mapping = inode->i_mapping; in nilfs_lookup_dirty_data_buffers()
709 * A valid range is given for sync-ing data pages. The in nilfs_lookup_dirty_data_buffers()
710 * range is rounded to per-page; extra dirty buffers in nilfs_lookup_dirty_data_buffers()
728 if (unlikely(folio->mapping != mapping)) { in nilfs_lookup_dirty_data_buffers()
735 create_empty_buffers(&folio->page, i_blocksize(inode), 0); in nilfs_lookup_dirty_data_buffers()
745 list_add_tail(&bh->b_assoc_buffers, listp); in nilfs_lookup_dirty_data_buffers()
752 } while (bh = bh->b_this_page, bh != head); in nilfs_lookup_dirty_data_buffers()
763 struct inode *btnc_inode = ii->i_assoc_inode; in nilfs_lookup_dirty_node_buffers()
773 while (filemap_get_folios_tag(btnc_inode->i_mapping, &index, in nilfs_lookup_dirty_node_buffers()
774 (pgoff_t)-1, PAGECACHE_TAG_DIRTY, &fbatch)) { in nilfs_lookup_dirty_node_buffers()
781 list_add_tail(&bh->b_assoc_buffers, in nilfs_lookup_dirty_node_buffers()
784 bh = bh->b_this_page; in nilfs_lookup_dirty_node_buffers()
800 spin_lock(&nilfs->ns_inode_lock); in nilfs_dispose_list()
802 list_del_init(&ii->i_dirty); in nilfs_dispose_list()
804 if (unlikely(ii->i_bh)) { in nilfs_dispose_list()
805 brelse(ii->i_bh); in nilfs_dispose_list()
806 ii->i_bh = NULL; in nilfs_dispose_list()
808 } else if (test_bit(NILFS_I_DIRTY, &ii->i_state)) { in nilfs_dispose_list()
809 set_bit(NILFS_I_QUEUED, &ii->i_state); in nilfs_dispose_list()
810 list_add_tail(&ii->i_dirty, in nilfs_dispose_list()
811 &nilfs->ns_dirty_files); in nilfs_dispose_list()
818 spin_unlock(&nilfs->ns_inode_lock); in nilfs_dispose_list()
820 for (pii = ivec; nv > 0; pii++, nv--) in nilfs_dispose_list()
821 iput(&(*pii)->vfs_inode); in nilfs_dispose_list()
827 struct nilfs_sc_info *sci = container_of(work, struct nilfs_sc_info, in nilfs_iput_work_func() local
829 struct the_nilfs *nilfs = sci->sc_super->s_fs_info; in nilfs_iput_work_func()
831 nilfs_dispose_list(nilfs, &sci->sc_iput_queue, 0); in nilfs_iput_work_func()
839 if (nilfs_mdt_fetch_dirty(root->ifile)) in nilfs_test_metadata_dirty()
841 if (nilfs_mdt_fetch_dirty(nilfs->ns_cpfile)) in nilfs_test_metadata_dirty()
843 if (nilfs_mdt_fetch_dirty(nilfs->ns_sufile)) in nilfs_test_metadata_dirty()
845 if ((ret || nilfs_doing_gc()) && nilfs_mdt_fetch_dirty(nilfs->ns_dat)) in nilfs_test_metadata_dirty()
850 static int nilfs_segctor_clean(struct nilfs_sc_info *sci) in nilfs_segctor_clean() argument
852 return list_empty(&sci->sc_dirty_files) && in nilfs_segctor_clean()
853 !test_bit(NILFS_SC_DIRTY, &sci->sc_flags) && in nilfs_segctor_clean()
854 sci->sc_nfreesegs == 0 && in nilfs_segctor_clean()
855 (!nilfs_doing_gc() || list_empty(&sci->sc_gc_inodes)); in nilfs_segctor_clean()
858 static int nilfs_segctor_confirm(struct nilfs_sc_info *sci) in nilfs_segctor_confirm() argument
860 struct the_nilfs *nilfs = sci->sc_super->s_fs_info; in nilfs_segctor_confirm()
863 if (nilfs_test_metadata_dirty(nilfs, sci->sc_root)) in nilfs_segctor_confirm()
864 set_bit(NILFS_SC_DIRTY, &sci->sc_flags); in nilfs_segctor_confirm()
866 spin_lock(&nilfs->ns_inode_lock); in nilfs_segctor_confirm()
867 if (list_empty(&nilfs->ns_dirty_files) && nilfs_segctor_clean(sci)) in nilfs_segctor_confirm()
870 spin_unlock(&nilfs->ns_inode_lock); in nilfs_segctor_confirm()
874 static void nilfs_segctor_clear_metadata_dirty(struct nilfs_sc_info *sci) in nilfs_segctor_clear_metadata_dirty() argument
876 struct the_nilfs *nilfs = sci->sc_super->s_fs_info; in nilfs_segctor_clear_metadata_dirty()
878 nilfs_mdt_clear_dirty(sci->sc_root->ifile); in nilfs_segctor_clear_metadata_dirty()
879 nilfs_mdt_clear_dirty(nilfs->ns_cpfile); in nilfs_segctor_clear_metadata_dirty()
880 nilfs_mdt_clear_dirty(nilfs->ns_sufile); in nilfs_segctor_clear_metadata_dirty()
881 nilfs_mdt_clear_dirty(nilfs->ns_dat); in nilfs_segctor_clear_metadata_dirty()
884 static int nilfs_segctor_create_checkpoint(struct nilfs_sc_info *sci) in nilfs_segctor_create_checkpoint() argument
886 struct the_nilfs *nilfs = sci->sc_super->s_fs_info; in nilfs_segctor_create_checkpoint()
892 err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, 1, in nilfs_segctor_create_checkpoint()
901 nilfs_mdt_mark_dirty(nilfs->ns_cpfile); in nilfs_segctor_create_checkpoint()
903 nilfs->ns_cpfile, nilfs->ns_cno, bh_cp); in nilfs_segctor_create_checkpoint()
904 } else if (err == -EINVAL || err == -ENOENT) { in nilfs_segctor_create_checkpoint()
905 nilfs_error(sci->sc_super, in nilfs_segctor_create_checkpoint()
907 err = -EIO; in nilfs_segctor_create_checkpoint()
912 static int nilfs_segctor_fill_in_checkpoint(struct nilfs_sc_info *sci) in nilfs_segctor_fill_in_checkpoint() argument
914 struct the_nilfs *nilfs = sci->sc_super->s_fs_info; in nilfs_segctor_fill_in_checkpoint()
919 err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, 0, in nilfs_segctor_fill_in_checkpoint()
922 if (err == -EINVAL || err == -ENOENT) { in nilfs_segctor_fill_in_checkpoint()
923 nilfs_error(sci->sc_super, in nilfs_segctor_fill_in_checkpoint()
925 err = -EIO; in nilfs_segctor_fill_in_checkpoint()
929 raw_cp->cp_snapshot_list.ssl_next = 0; in nilfs_segctor_fill_in_checkpoint()
930 raw_cp->cp_snapshot_list.ssl_prev = 0; in nilfs_segctor_fill_in_checkpoint()
931 raw_cp->cp_inodes_count = in nilfs_segctor_fill_in_checkpoint()
932 cpu_to_le64(atomic64_read(&sci->sc_root->inodes_count)); in nilfs_segctor_fill_in_checkpoint()
933 raw_cp->cp_blocks_count = in nilfs_segctor_fill_in_checkpoint()
934 cpu_to_le64(atomic64_read(&sci->sc_root->blocks_count)); in nilfs_segctor_fill_in_checkpoint()
935 raw_cp->cp_nblk_inc = in nilfs_segctor_fill_in_checkpoint()
936 cpu_to_le64(sci->sc_nblk_inc + sci->sc_nblk_this_inc); in nilfs_segctor_fill_in_checkpoint()
937 raw_cp->cp_create = cpu_to_le64(sci->sc_seg_ctime); in nilfs_segctor_fill_in_checkpoint()
938 raw_cp->cp_cno = cpu_to_le64(nilfs->ns_cno); in nilfs_segctor_fill_in_checkpoint()
940 if (test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags)) in nilfs_segctor_fill_in_checkpoint()
945 nilfs_write_inode_common(sci->sc_root->ifile, in nilfs_segctor_fill_in_checkpoint()
946 &raw_cp->cp_ifile_inode, 1); in nilfs_segctor_fill_in_checkpoint()
947 nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, bh_cp); in nilfs_segctor_fill_in_checkpoint()
961 if (test_bit(NILFS_I_BMAP, &ii->i_state)) { in nilfs_fill_in_file_bmap()
962 ibh = ii->i_bh; in nilfs_fill_in_file_bmap()
964 raw_inode = nilfs_ifile_map_inode(ifile, ii->vfs_inode.i_ino, in nilfs_fill_in_file_bmap()
966 nilfs_bmap_write(ii->i_bmap, raw_inode); in nilfs_fill_in_file_bmap()
967 nilfs_ifile_unmap_inode(ifile, ii->vfs_inode.i_ino, ibh); in nilfs_fill_in_file_bmap()
971 static void nilfs_segctor_fill_in_file_bmap(struct nilfs_sc_info *sci) in nilfs_segctor_fill_in_file_bmap() argument
975 list_for_each_entry(ii, &sci->sc_dirty_files, i_dirty) { in nilfs_segctor_fill_in_file_bmap()
976 nilfs_fill_in_file_bmap(sci->sc_root->ifile, ii); in nilfs_segctor_fill_in_file_bmap()
977 set_bit(NILFS_I_COLLECTED, &ii->i_state); in nilfs_segctor_fill_in_file_bmap()
981 static void nilfs_segctor_fill_in_super_root(struct nilfs_sc_info *sci, in nilfs_segctor_fill_in_super_root() argument
988 bh_sr = NILFS_LAST_SEGBUF(&sci->sc_segbufs)->sb_super_root; in nilfs_segctor_fill_in_super_root()
991 raw_sr = (struct nilfs_super_root *)bh_sr->b_data; in nilfs_segctor_fill_in_super_root()
992 isz = nilfs->ns_inode_size; in nilfs_segctor_fill_in_super_root()
995 raw_sr->sr_sum = 0; /* Ensure initialization within this update */ in nilfs_segctor_fill_in_super_root()
996 raw_sr->sr_bytes = cpu_to_le16(srsz); in nilfs_segctor_fill_in_super_root()
997 raw_sr->sr_nongc_ctime in nilfs_segctor_fill_in_super_root()
999 nilfs->ns_nongc_ctime : sci->sc_seg_ctime); in nilfs_segctor_fill_in_super_root()
1000 raw_sr->sr_flags = 0; in nilfs_segctor_fill_in_super_root()
1002 nilfs_write_inode_common(nilfs->ns_dat, (void *)raw_sr + in nilfs_segctor_fill_in_super_root()
1004 nilfs_write_inode_common(nilfs->ns_cpfile, (void *)raw_sr + in nilfs_segctor_fill_in_super_root()
1006 nilfs_write_inode_common(nilfs->ns_sufile, (void *)raw_sr + in nilfs_segctor_fill_in_super_root()
1008 memset((void *)raw_sr + srsz, 0, nilfs->ns_blocksize - srsz); in nilfs_segctor_fill_in_super_root()
1018 if (test_bit(NILFS_I_COLLECTED, &ii->i_state)) in nilfs_redirty_inodes()
1019 clear_bit(NILFS_I_COLLECTED, &ii->i_state); in nilfs_redirty_inodes()
1028 if (!test_and_clear_bit(NILFS_I_COLLECTED, &ii->i_state)) in nilfs_drop_collected_inodes()
1031 clear_bit(NILFS_I_INODE_SYNC, &ii->i_state); in nilfs_drop_collected_inodes()
1032 set_bit(NILFS_I_UPDATED, &ii->i_state); in nilfs_drop_collected_inodes()
1036 static int nilfs_segctor_apply_buffers(struct nilfs_sc_info *sci, in nilfs_segctor_apply_buffers() argument
1048 list_del_init(&bh->b_assoc_buffers); in nilfs_segctor_apply_buffers()
1049 err = collect(sci, bh, inode); in nilfs_segctor_apply_buffers()
1061 list_del_init(&bh->b_assoc_buffers); in nilfs_segctor_apply_buffers()
1067 static size_t nilfs_segctor_buffer_rest(struct nilfs_sc_info *sci) in nilfs_segctor_buffer_rest() argument
1070 return sci->sc_segbuf_nblocks - in nilfs_segctor_buffer_rest()
1071 (sci->sc_nblk_this_inc + sci->sc_curseg->sb_sum.nblocks); in nilfs_segctor_buffer_rest()
1074 static int nilfs_segctor_scan_file(struct nilfs_sc_info *sci, in nilfs_segctor_scan_file() argument
1082 if (!(sci->sc_stage.flags & NILFS_CF_NODE)) { in nilfs_segctor_scan_file()
1083 size_t n, rest = nilfs_segctor_buffer_rest(sci); in nilfs_segctor_scan_file()
1089 sci, inode, &data_buffers, in nilfs_segctor_scan_file()
1090 sc_ops->collect_data); in nilfs_segctor_scan_file()
1091 BUG_ON(!err); /* always receive -E2BIG or true error */ in nilfs_segctor_scan_file()
1097 if (!(sci->sc_stage.flags & NILFS_CF_NODE)) { in nilfs_segctor_scan_file()
1099 sci, inode, &data_buffers, sc_ops->collect_data); in nilfs_segctor_scan_file()
1103 sci, inode, &node_buffers, NULL); in nilfs_segctor_scan_file()
1106 sci->sc_stage.flags |= NILFS_CF_NODE; in nilfs_segctor_scan_file()
1110 sci, inode, &node_buffers, sc_ops->collect_node); in nilfs_segctor_scan_file()
1114 nilfs_bmap_lookup_dirty_buffers(NILFS_I(inode)->i_bmap, &node_buffers); in nilfs_segctor_scan_file()
1116 sci, inode, &node_buffers, sc_ops->collect_bmap); in nilfs_segctor_scan_file()
1120 nilfs_segctor_end_finfo(sci, inode); in nilfs_segctor_scan_file()
1121 sci->sc_stage.flags &= ~NILFS_CF_NODE; in nilfs_segctor_scan_file()
1127 static int nilfs_segctor_scan_file_dsync(struct nilfs_sc_info *sci, in nilfs_segctor_scan_file_dsync() argument
1131 size_t n, rest = nilfs_segctor_buffer_rest(sci); in nilfs_segctor_scan_file_dsync()
1135 sci->sc_dsync_start, in nilfs_segctor_scan_file_dsync()
1136 sci->sc_dsync_end); in nilfs_segctor_scan_file_dsync()
1138 err = nilfs_segctor_apply_buffers(sci, inode, &data_buffers, in nilfs_segctor_scan_file_dsync()
1141 nilfs_segctor_end_finfo(sci, inode); in nilfs_segctor_scan_file_dsync()
1143 /* always receive -E2BIG or true error if n > rest */ in nilfs_segctor_scan_file_dsync()
1148 static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode) in nilfs_segctor_collect_blocks() argument
1150 struct the_nilfs *nilfs = sci->sc_super->s_fs_info; in nilfs_segctor_collect_blocks()
1156 switch (nilfs_sc_cstage_get(sci)) { in nilfs_segctor_collect_blocks()
1158 /* Pre-processes */ in nilfs_segctor_collect_blocks()
1159 sci->sc_stage.flags = 0; in nilfs_segctor_collect_blocks()
1161 if (!test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags)) { in nilfs_segctor_collect_blocks()
1162 sci->sc_nblk_inc = 0; in nilfs_segctor_collect_blocks()
1163 sci->sc_curseg->sb_sum.flags = NILFS_SS_LOGBGN; in nilfs_segctor_collect_blocks()
1165 nilfs_sc_cstage_set(sci, NILFS_ST_DSYNC); in nilfs_segctor_collect_blocks()
1170 sci->sc_stage.dirty_file_ptr = NULL; in nilfs_segctor_collect_blocks()
1171 sci->sc_stage.gc_inode_ptr = NULL; in nilfs_segctor_collect_blocks()
1173 nilfs_sc_cstage_set(sci, NILFS_ST_DAT); in nilfs_segctor_collect_blocks()
1176 nilfs_sc_cstage_inc(sci); in nilfs_segctor_collect_blocks()
1180 head = &sci->sc_gc_inodes; in nilfs_segctor_collect_blocks()
1181 ii = list_prepare_entry(sci->sc_stage.gc_inode_ptr, in nilfs_segctor_collect_blocks()
1185 sci, &ii->vfs_inode, in nilfs_segctor_collect_blocks()
1188 sci->sc_stage.gc_inode_ptr = list_entry( in nilfs_segctor_collect_blocks()
1189 ii->i_dirty.prev, in nilfs_segctor_collect_blocks()
1194 set_bit(NILFS_I_COLLECTED, &ii->i_state); in nilfs_segctor_collect_blocks()
1196 sci->sc_stage.gc_inode_ptr = NULL; in nilfs_segctor_collect_blocks()
1198 nilfs_sc_cstage_inc(sci); in nilfs_segctor_collect_blocks()
1201 head = &sci->sc_dirty_files; in nilfs_segctor_collect_blocks()
1202 ii = list_prepare_entry(sci->sc_stage.dirty_file_ptr, head, in nilfs_segctor_collect_blocks()
1205 clear_bit(NILFS_I_DIRTY, &ii->i_state); in nilfs_segctor_collect_blocks()
1207 err = nilfs_segctor_scan_file(sci, &ii->vfs_inode, in nilfs_segctor_collect_blocks()
1210 sci->sc_stage.dirty_file_ptr = in nilfs_segctor_collect_blocks()
1211 list_entry(ii->i_dirty.prev, in nilfs_segctor_collect_blocks()
1216 /* sci->sc_stage.dirty_file_ptr = NILFS_I(inode); */ in nilfs_segctor_collect_blocks()
1219 sci->sc_stage.dirty_file_ptr = NULL; in nilfs_segctor_collect_blocks()
1221 nilfs_sc_cstage_set(sci, NILFS_ST_DONE); in nilfs_segctor_collect_blocks()
1224 nilfs_sc_cstage_inc(sci); in nilfs_segctor_collect_blocks()
1225 sci->sc_stage.flags |= NILFS_CF_IFILE_STARTED; in nilfs_segctor_collect_blocks()
1228 err = nilfs_segctor_scan_file(sci, sci->sc_root->ifile, in nilfs_segctor_collect_blocks()
1232 nilfs_sc_cstage_inc(sci); in nilfs_segctor_collect_blocks()
1234 err = nilfs_segctor_create_checkpoint(sci); in nilfs_segctor_collect_blocks()
1239 err = nilfs_segctor_scan_file(sci, nilfs->ns_cpfile, in nilfs_segctor_collect_blocks()
1243 nilfs_sc_cstage_inc(sci); in nilfs_segctor_collect_blocks()
1246 err = nilfs_sufile_freev(nilfs->ns_sufile, sci->sc_freesegs, in nilfs_segctor_collect_blocks()
1247 sci->sc_nfreesegs, &ndone); in nilfs_segctor_collect_blocks()
1249 nilfs_sufile_cancel_freev(nilfs->ns_sufile, in nilfs_segctor_collect_blocks()
1250 sci->sc_freesegs, ndone, in nilfs_segctor_collect_blocks()
1254 sci->sc_stage.flags |= NILFS_CF_SUFREED; in nilfs_segctor_collect_blocks()
1256 err = nilfs_segctor_scan_file(sci, nilfs->ns_sufile, in nilfs_segctor_collect_blocks()
1260 nilfs_sc_cstage_inc(sci); in nilfs_segctor_collect_blocks()
1264 err = nilfs_segctor_scan_file(sci, nilfs->ns_dat, in nilfs_segctor_collect_blocks()
1269 nilfs_sc_cstage_set(sci, NILFS_ST_DONE); in nilfs_segctor_collect_blocks()
1272 nilfs_sc_cstage_inc(sci); in nilfs_segctor_collect_blocks()
1277 err = nilfs_segctor_add_super_root(sci); in nilfs_segctor_collect_blocks()
1282 sci->sc_curseg->sb_sum.flags |= NILFS_SS_LOGEND; in nilfs_segctor_collect_blocks()
1283 nilfs_sc_cstage_set(sci, NILFS_ST_DONE); in nilfs_segctor_collect_blocks()
1287 sci->sc_curseg->sb_sum.flags |= NILFS_SS_SYNDT; in nilfs_segctor_collect_blocks()
1288 ii = sci->sc_dsync_inode; in nilfs_segctor_collect_blocks()
1289 if (!test_bit(NILFS_I_BUSY, &ii->i_state)) in nilfs_segctor_collect_blocks()
1292 err = nilfs_segctor_scan_file_dsync(sci, &ii->vfs_inode); in nilfs_segctor_collect_blocks()
1295 sci->sc_curseg->sb_sum.flags |= NILFS_SS_LOGEND; in nilfs_segctor_collect_blocks()
1296 nilfs_sc_cstage_set(sci, NILFS_ST_DONE); in nilfs_segctor_collect_blocks()
1309 * nilfs_segctor_begin_construction - setup segment buffer to make a new log
1310 * @sci: nilfs_sc_info
1313 static int nilfs_segctor_begin_construction(struct nilfs_sc_info *sci, in nilfs_segctor_begin_construction() argument
1320 segbuf = nilfs_segbuf_new(sci->sc_super); in nilfs_segctor_begin_construction()
1322 return -ENOMEM; in nilfs_segctor_begin_construction()
1324 if (list_empty(&sci->sc_write_logs)) { in nilfs_segctor_begin_construction()
1325 nilfs_segbuf_map(segbuf, nilfs->ns_segnum, in nilfs_segctor_begin_construction()
1326 nilfs->ns_pseg_offset, nilfs); in nilfs_segctor_begin_construction()
1327 if (segbuf->sb_rest_blocks < NILFS_PSEG_MIN_BLOCKS) { in nilfs_segctor_begin_construction()
1329 nilfs_segbuf_map(segbuf, nilfs->ns_segnum, 0, nilfs); in nilfs_segctor_begin_construction()
1332 segbuf->sb_sum.seg_seq = nilfs->ns_seg_seq; in nilfs_segctor_begin_construction()
1333 nextnum = nilfs->ns_nextnum; in nilfs_segctor_begin_construction()
1335 if (nilfs->ns_segnum == nilfs->ns_nextnum) in nilfs_segctor_begin_construction()
1340 prev = NILFS_LAST_SEGBUF(&sci->sc_write_logs); in nilfs_segctor_begin_construction()
1342 segbuf->sb_sum.seg_seq = prev->sb_sum.seg_seq; in nilfs_segctor_begin_construction()
1343 nextnum = prev->sb_nextnum; in nilfs_segctor_begin_construction()
1345 if (segbuf->sb_rest_blocks < NILFS_PSEG_MIN_BLOCKS) { in nilfs_segctor_begin_construction()
1346 nilfs_segbuf_map(segbuf, prev->sb_nextnum, 0, nilfs); in nilfs_segctor_begin_construction()
1347 segbuf->sb_sum.seg_seq++; in nilfs_segctor_begin_construction()
1352 err = nilfs_sufile_mark_dirty(nilfs->ns_sufile, segbuf->sb_segnum); in nilfs_segctor_begin_construction()
1357 err = nilfs_sufile_alloc(nilfs->ns_sufile, &nextnum); in nilfs_segctor_begin_construction()
1363 BUG_ON(!list_empty(&sci->sc_segbufs)); in nilfs_segctor_begin_construction()
1364 list_add_tail(&segbuf->sb_list, &sci->sc_segbufs); in nilfs_segctor_begin_construction()
1365 sci->sc_segbuf_nblocks = segbuf->sb_rest_blocks; in nilfs_segctor_begin_construction()
1373 static int nilfs_segctor_extend_segments(struct nilfs_sc_info *sci, in nilfs_segctor_extend_segments() argument
1377 struct inode *sufile = nilfs->ns_sufile; in nilfs_segctor_extend_segments()
1382 prev = NILFS_LAST_SEGBUF(&sci->sc_segbufs); in nilfs_segctor_extend_segments()
1389 err = nilfs_sufile_mark_dirty(sufile, prev->sb_nextnum); in nilfs_segctor_extend_segments()
1395 err = -ENOMEM; in nilfs_segctor_extend_segments()
1396 segbuf = nilfs_segbuf_new(sci->sc_super); in nilfs_segctor_extend_segments()
1400 /* map this buffer to region of segment on-disk */ in nilfs_segctor_extend_segments()
1401 nilfs_segbuf_map(segbuf, prev->sb_nextnum, 0, nilfs); in nilfs_segctor_extend_segments()
1402 sci->sc_segbuf_nblocks += segbuf->sb_rest_blocks; in nilfs_segctor_extend_segments()
1409 segbuf->sb_sum.seg_seq = prev->sb_sum.seg_seq + 1; in nilfs_segctor_extend_segments()
1412 list_add_tail(&segbuf->sb_list, &list); in nilfs_segctor_extend_segments()
1415 list_splice_tail(&list, &sci->sc_segbufs); in nilfs_segctor_extend_segments()
1422 ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); in nilfs_segctor_extend_segments()
1433 struct inode *sufile = nilfs->ns_sufile; in nilfs_free_incomplete_logs()
1437 if (nilfs->ns_nextnum != segbuf->sb_nextnum) { in nilfs_free_incomplete_logs()
1438 ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); in nilfs_free_incomplete_logs()
1441 if (atomic_read(&segbuf->sb_err)) { in nilfs_free_incomplete_logs()
1443 if (segbuf->sb_pseg_start != segbuf->sb_fseg_start) in nilfs_free_incomplete_logs()
1448 nilfs_terminate_segment(nilfs, segbuf->sb_fseg_start, in nilfs_free_incomplete_logs()
1449 segbuf->sb_fseg_end); in nilfs_free_incomplete_logs()
1456 if (prev->sb_nextnum != segbuf->sb_nextnum) { in nilfs_free_incomplete_logs()
1457 ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); in nilfs_free_incomplete_logs()
1460 if (atomic_read(&segbuf->sb_err) && in nilfs_free_incomplete_logs()
1461 segbuf->sb_segnum != nilfs->ns_nextnum) in nilfs_free_incomplete_logs()
1463 nilfs_sufile_set_error(sufile, segbuf->sb_segnum); in nilfs_free_incomplete_logs()
1468 static void nilfs_segctor_update_segusage(struct nilfs_sc_info *sci, in nilfs_segctor_update_segusage() argument
1475 list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { in nilfs_segctor_update_segusage()
1476 live_blocks = segbuf->sb_sum.nblocks + in nilfs_segctor_update_segusage()
1477 (segbuf->sb_pseg_start - segbuf->sb_fseg_start); in nilfs_segctor_update_segusage()
1478 ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, in nilfs_segctor_update_segusage()
1480 sci->sc_seg_ctime); in nilfs_segctor_update_segusage()
1491 ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, in nilfs_cancel_segusage()
1492 segbuf->sb_pseg_start - in nilfs_cancel_segusage()
1493 segbuf->sb_fseg_start, 0); in nilfs_cancel_segusage()
1497 ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, in nilfs_cancel_segusage()
1503 static void nilfs_segctor_truncate_segments(struct nilfs_sc_info *sci, in nilfs_segctor_truncate_segments() argument
1510 list_for_each_entry_continue(segbuf, &sci->sc_segbufs, sb_list) { in nilfs_segctor_truncate_segments()
1511 sci->sc_segbuf_nblocks -= segbuf->sb_rest_blocks; in nilfs_segctor_truncate_segments()
1512 ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); in nilfs_segctor_truncate_segments()
1515 nilfs_truncate_logs(&sci->sc_segbufs, last); in nilfs_segctor_truncate_segments()
1519 static int nilfs_segctor_collect(struct nilfs_sc_info *sci, in nilfs_segctor_collect() argument
1522 struct nilfs_cstage prev_stage = sci->sc_stage; in nilfs_segctor_collect()
1527 sci->sc_nblk_this_inc = 0; in nilfs_segctor_collect()
1528 sci->sc_curseg = NILFS_FIRST_SEGBUF(&sci->sc_segbufs); in nilfs_segctor_collect()
1530 err = nilfs_segctor_reset_segment_buffer(sci); in nilfs_segctor_collect()
1534 err = nilfs_segctor_collect_blocks(sci, mode); in nilfs_segctor_collect()
1535 sci->sc_nblk_this_inc += sci->sc_curseg->sb_sum.nblocks; in nilfs_segctor_collect()
1539 if (unlikely(err != -E2BIG)) in nilfs_segctor_collect()
1544 nilfs_sc_cstage_get(sci) < NILFS_ST_CPFILE) in nilfs_segctor_collect()
1547 nilfs_clear_logs(&sci->sc_segbufs); in nilfs_segctor_collect()
1549 if (sci->sc_stage.flags & NILFS_CF_SUFREED) { in nilfs_segctor_collect()
1550 err = nilfs_sufile_cancel_freev(nilfs->ns_sufile, in nilfs_segctor_collect()
1551 sci->sc_freesegs, in nilfs_segctor_collect()
1552 sci->sc_nfreesegs, in nilfs_segctor_collect()
1555 sci->sc_stage.flags &= ~NILFS_CF_SUFREED; in nilfs_segctor_collect()
1558 err = nilfs_segctor_extend_segments(sci, nilfs, nadd); in nilfs_segctor_collect()
1563 sci->sc_stage = prev_stage; in nilfs_segctor_collect()
1565 nilfs_segctor_zeropad_segsum(sci); in nilfs_segctor_collect()
1566 nilfs_segctor_truncate_segments(sci, sci->sc_curseg, nilfs->ns_sufile); in nilfs_segctor_collect()
1576 BUG_ON(!list_empty(&new_bh->b_assoc_buffers)); in nilfs_list_replace_buffer()
1578 list_replace_init(&old_bh->b_assoc_buffers, &new_bh->b_assoc_buffers); in nilfs_list_replace_buffer()
1583 nilfs_segctor_update_payload_blocknr(struct nilfs_sc_info *sci, in nilfs_segctor_update_payload_blocknr() argument
1589 unsigned long nfinfo = segbuf->sb_sum.nfinfo; in nilfs_segctor_update_payload_blocknr()
1602 blocknr = segbuf->sb_pseg_start + segbuf->sb_sum.nsumblk; in nilfs_segctor_update_payload_blocknr()
1603 ssp.bh = NILFS_SEGBUF_FIRST_BH(&segbuf->sb_segsum_buffers); in nilfs_segctor_update_payload_blocknr()
1606 list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { in nilfs_segctor_update_payload_blocknr()
1607 if (bh == segbuf->sb_super_root) in nilfs_segctor_update_payload_blocknr()
1611 sci, &ssp, sizeof(*finfo)); in nilfs_segctor_update_payload_blocknr()
1612 ino = le64_to_cpu(finfo->fi_ino); in nilfs_segctor_update_payload_blocknr()
1613 nblocks = le32_to_cpu(finfo->fi_nblocks); in nilfs_segctor_update_payload_blocknr()
1614 ndatablk = le32_to_cpu(finfo->fi_ndatablk); in nilfs_segctor_update_payload_blocknr()
1616 inode = bh->b_folio->mapping->host; in nilfs_segctor_update_payload_blocknr()
1627 err = nilfs_bmap_assign(NILFS_I(inode)->i_bmap, &bh, blocknr, in nilfs_segctor_update_payload_blocknr()
1636 sc_op->write_data_binfo(sci, &ssp, &binfo); in nilfs_segctor_update_payload_blocknr()
1638 sc_op->write_node_binfo(sci, &ssp, &binfo); in nilfs_segctor_update_payload_blocknr()
1641 if (--nblocks == 0) { in nilfs_segctor_update_payload_blocknr()
1643 if (--nfinfo == 0) in nilfs_segctor_update_payload_blocknr()
1646 ndatablk--; in nilfs_segctor_update_payload_blocknr()
1655 static int nilfs_segctor_assign(struct nilfs_sc_info *sci, int mode) in nilfs_segctor_assign() argument
1660 list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { in nilfs_segctor_assign()
1661 err = nilfs_segctor_update_payload_blocknr(sci, segbuf, mode); in nilfs_segctor_assign()
1673 * For split b-tree node pages, this function may be called in nilfs_begin_page_io()
1684 static void nilfs_segctor_prepare_write(struct nilfs_sc_info *sci) in nilfs_segctor_prepare_write() argument
1689 list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { in nilfs_segctor_prepare_write()
1692 list_for_each_entry(bh, &segbuf->sb_segsum_buffers, in nilfs_segctor_prepare_write()
1694 if (bh->b_page != bd_page) { in nilfs_segctor_prepare_write()
1701 bd_page = bh->b_page; in nilfs_segctor_prepare_write()
1705 list_for_each_entry(bh, &segbuf->sb_payload_buffers, in nilfs_segctor_prepare_write()
1708 if (bh == segbuf->sb_super_root) { in nilfs_segctor_prepare_write()
1709 if (bh->b_page != bd_page) { in nilfs_segctor_prepare_write()
1714 bd_page = bh->b_page; in nilfs_segctor_prepare_write()
1718 if (bh->b_page != fs_page) { in nilfs_segctor_prepare_write()
1720 fs_page = bh->b_page; in nilfs_segctor_prepare_write()
1733 static int nilfs_segctor_write(struct nilfs_sc_info *sci, in nilfs_segctor_write() argument
1738 ret = nilfs_write_logs(&sci->sc_segbufs, nilfs); in nilfs_segctor_write()
1739 list_splice_tail_init(&sci->sc_segbufs, &sci->sc_write_logs); in nilfs_segctor_write()
1750 * For b-tree node pages, this function may be called twice in nilfs_end_page_io()
1755 * For pages holding split b-tree node buffers, dirty in nilfs_end_page_io()
1791 list_for_each_entry(bh, &segbuf->sb_segsum_buffers, in nilfs_abort_logs()
1794 if (bh->b_page != bd_page) { in nilfs_abort_logs()
1797 bd_page = bh->b_page; in nilfs_abort_logs()
1801 list_for_each_entry(bh, &segbuf->sb_payload_buffers, in nilfs_abort_logs()
1804 if (bh == segbuf->sb_super_root) { in nilfs_abort_logs()
1806 if (bh->b_page != bd_page) { in nilfs_abort_logs()
1808 bd_page = bh->b_page; in nilfs_abort_logs()
1812 if (bh->b_page != fs_page) { in nilfs_abort_logs()
1814 fs_page = bh->b_page; in nilfs_abort_logs()
1824 static void nilfs_segctor_abort_construction(struct nilfs_sc_info *sci, in nilfs_segctor_abort_construction() argument
1830 list_splice_tail_init(&sci->sc_write_logs, &logs); in nilfs_segctor_abort_construction()
1834 list_splice_tail_init(&sci->sc_segbufs, &logs); in nilfs_segctor_abort_construction()
1835 nilfs_cancel_segusage(&logs, nilfs->ns_sufile); in nilfs_segctor_abort_construction()
1838 if (sci->sc_stage.flags & NILFS_CF_SUFREED) { in nilfs_segctor_abort_construction()
1839 ret = nilfs_sufile_cancel_freev(nilfs->ns_sufile, in nilfs_segctor_abort_construction()
1840 sci->sc_freesegs, in nilfs_segctor_abort_construction()
1841 sci->sc_nfreesegs, in nilfs_segctor_abort_construction()
1852 nilfs->ns_segnum = segbuf->sb_segnum; in nilfs_set_next_segment()
1853 nilfs->ns_nextnum = segbuf->sb_nextnum; in nilfs_set_next_segment()
1854 nilfs->ns_pseg_offset = segbuf->sb_pseg_start - segbuf->sb_fseg_start in nilfs_set_next_segment()
1855 + segbuf->sb_sum.nblocks; in nilfs_set_next_segment()
1856 nilfs->ns_seg_seq = segbuf->sb_sum.seg_seq; in nilfs_set_next_segment()
1857 nilfs->ns_ctime = segbuf->sb_sum.ctime; in nilfs_set_next_segment()
1860 static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci) in nilfs_segctor_complete_write() argument
1864 struct the_nilfs *nilfs = sci->sc_super->s_fs_info; in nilfs_segctor_complete_write()
1867 list_for_each_entry(segbuf, &sci->sc_write_logs, sb_list) { in nilfs_segctor_complete_write()
1870 list_for_each_entry(bh, &segbuf->sb_segsum_buffers, in nilfs_segctor_complete_write()
1874 if (bh->b_page != bd_page) { in nilfs_segctor_complete_write()
1877 bd_page = bh->b_page; in nilfs_segctor_complete_write()
1884 * identifiable by the discontinuity of bh->b_page in nilfs_segctor_complete_write()
1887 * For B-tree node blocks, however, this assumption is not in nilfs_segctor_complete_write()
1888 * guaranteed. The cleanup code of B-tree node pages needs in nilfs_segctor_complete_write()
1891 list_for_each_entry(bh, &segbuf->sb_payload_buffers, in nilfs_segctor_complete_write()
1899 set_mask_bits(&bh->b_state, clear_bits, set_bits); in nilfs_segctor_complete_write()
1900 if (bh == segbuf->sb_super_root) { in nilfs_segctor_complete_write()
1901 if (bh->b_page != bd_page) { in nilfs_segctor_complete_write()
1903 bd_page = bh->b_page; in nilfs_segctor_complete_write()
1908 if (bh->b_page != fs_page) { in nilfs_segctor_complete_write()
1910 fs_page = bh->b_page; in nilfs_segctor_complete_write()
1915 if (segbuf->sb_sum.flags & NILFS_SS_LOGBGN) { in nilfs_segctor_complete_write()
1916 set_bit(NILFS_SC_UNCLOSED, &sci->sc_flags); in nilfs_segctor_complete_write()
1917 sci->sc_lseg_stime = jiffies; in nilfs_segctor_complete_write()
1919 if (segbuf->sb_sum.flags & NILFS_SS_LOGEND) in nilfs_segctor_complete_write()
1920 clear_bit(NILFS_SC_UNCLOSED, &sci->sc_flags); in nilfs_segctor_complete_write()
1932 nilfs_drop_collected_inodes(&sci->sc_dirty_files); in nilfs_segctor_complete_write()
1935 nilfs_drop_collected_inodes(&sci->sc_gc_inodes); in nilfs_segctor_complete_write()
1937 nilfs->ns_nongc_ctime = sci->sc_seg_ctime; in nilfs_segctor_complete_write()
1939 sci->sc_nblk_inc += sci->sc_nblk_this_inc; in nilfs_segctor_complete_write()
1941 segbuf = NILFS_LAST_SEGBUF(&sci->sc_write_logs); in nilfs_segctor_complete_write()
1945 nilfs->ns_flushed_device = 0; in nilfs_segctor_complete_write()
1946 nilfs_set_last_segment(nilfs, segbuf->sb_pseg_start, in nilfs_segctor_complete_write()
1947 segbuf->sb_sum.seg_seq, nilfs->ns_cno++); in nilfs_segctor_complete_write()
1949 clear_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags); in nilfs_segctor_complete_write()
1950 clear_bit(NILFS_SC_DIRTY, &sci->sc_flags); in nilfs_segctor_complete_write()
1951 set_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags); in nilfs_segctor_complete_write()
1952 nilfs_segctor_clear_metadata_dirty(sci); in nilfs_segctor_complete_write()
1954 clear_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags); in nilfs_segctor_complete_write()
1957 static int nilfs_segctor_wait(struct nilfs_sc_info *sci) in nilfs_segctor_wait() argument
1961 ret = nilfs_wait_on_logs(&sci->sc_write_logs); in nilfs_segctor_wait()
1963 nilfs_segctor_complete_write(sci); in nilfs_segctor_wait()
1964 nilfs_destroy_logs(&sci->sc_write_logs); in nilfs_segctor_wait()
1969 static int nilfs_segctor_collect_dirty_files(struct nilfs_sc_info *sci, in nilfs_segctor_collect_dirty_files() argument
1973 struct inode *ifile = sci->sc_root->ifile; in nilfs_segctor_collect_dirty_files()
1975 spin_lock(&nilfs->ns_inode_lock); in nilfs_segctor_collect_dirty_files()
1977 list_for_each_entry_safe(ii, n, &nilfs->ns_dirty_files, i_dirty) { in nilfs_segctor_collect_dirty_files()
1978 if (!ii->i_bh) { in nilfs_segctor_collect_dirty_files()
1982 spin_unlock(&nilfs->ns_inode_lock); in nilfs_segctor_collect_dirty_files()
1984 ifile, ii->vfs_inode.i_ino, &ibh); in nilfs_segctor_collect_dirty_files()
1986 nilfs_warn(sci->sc_super, in nilfs_segctor_collect_dirty_files()
1988 err, ii->vfs_inode.i_ino); in nilfs_segctor_collect_dirty_files()
1991 spin_lock(&nilfs->ns_inode_lock); in nilfs_segctor_collect_dirty_files()
1992 if (likely(!ii->i_bh)) in nilfs_segctor_collect_dirty_files()
1993 ii->i_bh = ibh; in nilfs_segctor_collect_dirty_files()
2000 mark_buffer_dirty(ii->i_bh); in nilfs_segctor_collect_dirty_files()
2003 clear_bit(NILFS_I_QUEUED, &ii->i_state); in nilfs_segctor_collect_dirty_files()
2004 set_bit(NILFS_I_BUSY, &ii->i_state); in nilfs_segctor_collect_dirty_files()
2005 list_move_tail(&ii->i_dirty, &sci->sc_dirty_files); in nilfs_segctor_collect_dirty_files()
2007 spin_unlock(&nilfs->ns_inode_lock); in nilfs_segctor_collect_dirty_files()
2012 static void nilfs_segctor_drop_written_files(struct nilfs_sc_info *sci, in nilfs_segctor_drop_written_files() argument
2016 int during_mount = !(sci->sc_super->s_flags & SB_ACTIVE); in nilfs_segctor_drop_written_files()
2019 spin_lock(&nilfs->ns_inode_lock); in nilfs_segctor_drop_written_files()
2020 list_for_each_entry_safe(ii, n, &sci->sc_dirty_files, i_dirty) { in nilfs_segctor_drop_written_files()
2021 if (!test_and_clear_bit(NILFS_I_UPDATED, &ii->i_state) || in nilfs_segctor_drop_written_files()
2022 test_bit(NILFS_I_DIRTY, &ii->i_state)) in nilfs_segctor_drop_written_files()
2025 clear_bit(NILFS_I_BUSY, &ii->i_state); in nilfs_segctor_drop_written_files()
2026 brelse(ii->i_bh); in nilfs_segctor_drop_written_files()
2027 ii->i_bh = NULL; in nilfs_segctor_drop_written_files()
2028 list_del_init(&ii->i_dirty); in nilfs_segctor_drop_written_files()
2029 if (!ii->vfs_inode.i_nlink || during_mount) { in nilfs_segctor_drop_written_files()
2034 list_add_tail(&ii->i_dirty, &sci->sc_iput_queue); in nilfs_segctor_drop_written_files()
2037 spin_unlock(&nilfs->ns_inode_lock); in nilfs_segctor_drop_written_files()
2038 iput(&ii->vfs_inode); in nilfs_segctor_drop_written_files()
2039 spin_lock(&nilfs->ns_inode_lock); in nilfs_segctor_drop_written_files()
2042 spin_unlock(&nilfs->ns_inode_lock); in nilfs_segctor_drop_written_files()
2045 schedule_work(&sci->sc_iput_work); in nilfs_segctor_drop_written_files()
2051 static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) in nilfs_segctor_do_construct() argument
2053 struct the_nilfs *nilfs = sci->sc_super->s_fs_info; in nilfs_segctor_do_construct()
2056 if (sb_rdonly(sci->sc_super)) in nilfs_segctor_do_construct()
2057 return -EROFS; in nilfs_segctor_do_construct()
2059 nilfs_sc_cstage_set(sci, NILFS_ST_INIT); in nilfs_segctor_do_construct()
2060 sci->sc_cno = nilfs->ns_cno; in nilfs_segctor_do_construct()
2062 err = nilfs_segctor_collect_dirty_files(sci, nilfs); in nilfs_segctor_do_construct()
2066 if (nilfs_test_metadata_dirty(nilfs, sci->sc_root)) in nilfs_segctor_do_construct()
2067 set_bit(NILFS_SC_DIRTY, &sci->sc_flags); in nilfs_segctor_do_construct()
2069 if (nilfs_segctor_clean(sci)) in nilfs_segctor_do_construct()
2073 sci->sc_stage.flags &= ~NILFS_CF_HISTORY_MASK; in nilfs_segctor_do_construct()
2075 err = nilfs_segctor_begin_construction(sci, nilfs); in nilfs_segctor_do_construct()
2080 sci->sc_seg_ctime = ktime_get_real_seconds(); in nilfs_segctor_do_construct()
2082 err = nilfs_segctor_collect(sci, nilfs, mode); in nilfs_segctor_do_construct()
2087 if (nilfs_sc_cstage_get(sci) == NILFS_ST_DONE && in nilfs_segctor_do_construct()
2088 nilfs_segbuf_empty(sci->sc_curseg)) { in nilfs_segctor_do_construct()
2089 nilfs_segctor_abort_construction(sci, nilfs, 1); in nilfs_segctor_do_construct()
2093 err = nilfs_segctor_assign(sci, mode); in nilfs_segctor_do_construct()
2097 if (sci->sc_stage.flags & NILFS_CF_IFILE_STARTED) in nilfs_segctor_do_construct()
2098 nilfs_segctor_fill_in_file_bmap(sci); in nilfs_segctor_do_construct()
2101 nilfs_sc_cstage_get(sci) >= NILFS_ST_CPFILE) { in nilfs_segctor_do_construct()
2102 err = nilfs_segctor_fill_in_checkpoint(sci); in nilfs_segctor_do_construct()
2106 nilfs_segctor_fill_in_super_root(sci, nilfs); in nilfs_segctor_do_construct()
2108 nilfs_segctor_update_segusage(sci, nilfs->ns_sufile); in nilfs_segctor_do_construct()
2111 nilfs_segctor_prepare_write(sci); in nilfs_segctor_do_construct()
2113 nilfs_add_checksums_on_logs(&sci->sc_segbufs, in nilfs_segctor_do_construct()
2114 nilfs->ns_crc_seed); in nilfs_segctor_do_construct()
2116 err = nilfs_segctor_write(sci, nilfs); in nilfs_segctor_do_construct()
2120 if (nilfs_sc_cstage_get(sci) == NILFS_ST_DONE || in nilfs_segctor_do_construct()
2121 nilfs->ns_blocksize_bits != PAGE_SHIFT) { in nilfs_segctor_do_construct()
2129 err = nilfs_segctor_wait(sci); in nilfs_segctor_do_construct()
2133 } while (nilfs_sc_cstage_get(sci) != NILFS_ST_DONE); in nilfs_segctor_do_construct()
2136 nilfs_segctor_drop_written_files(sci, nilfs); in nilfs_segctor_do_construct()
2140 if (sci->sc_stage.flags & NILFS_CF_IFILE_STARTED) in nilfs_segctor_do_construct()
2141 nilfs_redirty_inodes(&sci->sc_dirty_files); in nilfs_segctor_do_construct()
2145 nilfs_redirty_inodes(&sci->sc_gc_inodes); in nilfs_segctor_do_construct()
2146 nilfs_segctor_abort_construction(sci, nilfs, err); in nilfs_segctor_do_construct()
2151 * nilfs_segctor_start_timer - set timer of background write
2152 * @sci: nilfs_sc_info
2158 static void nilfs_segctor_start_timer(struct nilfs_sc_info *sci) in nilfs_segctor_start_timer() argument
2160 spin_lock(&sci->sc_state_lock); in nilfs_segctor_start_timer()
2161 if (!(sci->sc_state & NILFS_SEGCTOR_COMMIT)) { in nilfs_segctor_start_timer()
2162 sci->sc_timer.expires = jiffies + sci->sc_interval; in nilfs_segctor_start_timer()
2163 add_timer(&sci->sc_timer); in nilfs_segctor_start_timer()
2164 sci->sc_state |= NILFS_SEGCTOR_COMMIT; in nilfs_segctor_start_timer()
2166 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_start_timer()
2169 static void nilfs_segctor_do_flush(struct nilfs_sc_info *sci, int bn) in nilfs_segctor_do_flush() argument
2171 spin_lock(&sci->sc_state_lock); in nilfs_segctor_do_flush()
2172 if (!(sci->sc_flush_request & BIT(bn))) { in nilfs_segctor_do_flush()
2173 unsigned long prev_req = sci->sc_flush_request; in nilfs_segctor_do_flush()
2175 sci->sc_flush_request |= BIT(bn); in nilfs_segctor_do_flush()
2177 wake_up(&sci->sc_wait_daemon); in nilfs_segctor_do_flush()
2179 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_do_flush()
2183 * nilfs_flush_segment - trigger a segment construction for resource control
2189 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_flush_segment()
2190 struct nilfs_sc_info *sci = nilfs->ns_writer; in nilfs_flush_segment() local
2192 if (!sci || nilfs_doing_construction()) in nilfs_flush_segment()
2194 nilfs_segctor_do_flush(sci, NILFS_MDT_INODE(sb, ino) ? ino : 0); in nilfs_flush_segment()
2205 static int nilfs_segctor_sync(struct nilfs_sc_info *sci) in nilfs_segctor_sync() argument
2210 spin_lock(&sci->sc_state_lock); in nilfs_segctor_sync()
2214 wait_req.seq = ++sci->sc_seq_request; in nilfs_segctor_sync()
2215 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_sync()
2218 add_wait_queue(&sci->sc_wait_request, &wait_req.wq); in nilfs_segctor_sync()
2220 wake_up(&sci->sc_wait_daemon); in nilfs_segctor_sync()
2231 err = -ERESTARTSYS; in nilfs_segctor_sync()
2234 finish_wait(&sci->sc_wait_request, &wait_req.wq); in nilfs_segctor_sync()
2238 static void nilfs_segctor_wakeup(struct nilfs_sc_info *sci, int err) in nilfs_segctor_wakeup() argument
2243 spin_lock_irqsave(&sci->sc_wait_request.lock, flags); in nilfs_segctor_wakeup()
2244 list_for_each_entry_safe(wrq, n, &sci->sc_wait_request.head, wq.entry) { in nilfs_segctor_wakeup()
2245 if (!atomic_read(&wrq->done) && in nilfs_segctor_wakeup()
2246 nilfs_cnt32_ge(sci->sc_seq_done, wrq->seq)) { in nilfs_segctor_wakeup()
2247 wrq->err = err; in nilfs_segctor_wakeup()
2248 atomic_set(&wrq->done, 1); in nilfs_segctor_wakeup()
2250 if (atomic_read(&wrq->done)) { in nilfs_segctor_wakeup()
2251 wrq->wq.func(&wrq->wq, in nilfs_segctor_wakeup()
2256 spin_unlock_irqrestore(&sci->sc_wait_request.lock, flags); in nilfs_segctor_wakeup()
2260 * nilfs_construct_segment - construct a logical segment
2266 * %-EROFS - Read only filesystem.
2268 * %-EIO - I/O error
2270 * %-ENOSPC - No space left on device (only in a panic state).
2272 * %-ERESTARTSYS - Interrupted.
2274 * %-ENOMEM - Insufficient memory available.
2278 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_construct_segment()
2279 struct nilfs_sc_info *sci = nilfs->ns_writer; in nilfs_construct_segment() local
2280 struct nilfs_transaction_info *ti; in nilfs_construct_segment() local
2282 if (sb_rdonly(sb) || unlikely(!sci)) in nilfs_construct_segment()
2283 return -EROFS; in nilfs_construct_segment()
2286 BUG_ON((ti = current->journal_info) && ti->ti_magic == NILFS_TI_MAGIC); in nilfs_construct_segment()
2288 return nilfs_segctor_sync(sci); in nilfs_construct_segment()
2292 * nilfs_construct_dsync_segment - construct a data-only logical segment
2301 * %-EROFS - Read only filesystem.
2303 * %-EIO - I/O error
2305 * %-ENOSPC - No space left on device (only in a panic state).
2307 * %-ERESTARTSYS - Interrupted.
2309 * %-ENOMEM - Insufficient memory available.
2314 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_construct_dsync_segment()
2315 struct nilfs_sc_info *sci = nilfs->ns_writer; in nilfs_construct_dsync_segment() local
2317 struct nilfs_transaction_info ti; in nilfs_construct_dsync_segment() local
2320 if (sb_rdonly(sb) || unlikely(!sci)) in nilfs_construct_dsync_segment()
2321 return -EROFS; in nilfs_construct_dsync_segment()
2323 nilfs_transaction_lock(sb, &ti, 0); in nilfs_construct_dsync_segment()
2326 if (test_bit(NILFS_I_INODE_SYNC, &ii->i_state) || in nilfs_construct_dsync_segment()
2328 test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags) || in nilfs_construct_dsync_segment()
2331 err = nilfs_segctor_sync(sci); in nilfs_construct_dsync_segment()
2335 spin_lock(&nilfs->ns_inode_lock); in nilfs_construct_dsync_segment()
2336 if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && in nilfs_construct_dsync_segment()
2337 !test_bit(NILFS_I_BUSY, &ii->i_state)) { in nilfs_construct_dsync_segment()
2338 spin_unlock(&nilfs->ns_inode_lock); in nilfs_construct_dsync_segment()
2342 spin_unlock(&nilfs->ns_inode_lock); in nilfs_construct_dsync_segment()
2343 sci->sc_dsync_inode = ii; in nilfs_construct_dsync_segment()
2344 sci->sc_dsync_start = start; in nilfs_construct_dsync_segment()
2345 sci->sc_dsync_end = end; in nilfs_construct_dsync_segment()
2347 err = nilfs_segctor_do_construct(sci, SC_LSEG_DSYNC); in nilfs_construct_dsync_segment()
2349 nilfs->ns_flushed_device = 0; in nilfs_construct_dsync_segment()
2359 * nilfs_segctor_accept - record accepted sequence count of log-write requests
2360 * @sci: segment constructor object
2362 static void nilfs_segctor_accept(struct nilfs_sc_info *sci) in nilfs_segctor_accept() argument
2364 spin_lock(&sci->sc_state_lock); in nilfs_segctor_accept()
2365 sci->sc_seq_accepted = sci->sc_seq_request; in nilfs_segctor_accept()
2366 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_accept()
2367 del_timer_sync(&sci->sc_timer); in nilfs_segctor_accept()
2371 * nilfs_segctor_notify - notify the result of request to caller threads
2372 * @sci: segment constructor object
2376 static void nilfs_segctor_notify(struct nilfs_sc_info *sci, int mode, int err) in nilfs_segctor_notify() argument
2379 spin_lock(&sci->sc_state_lock); in nilfs_segctor_notify()
2382 sci->sc_state &= ~NILFS_SEGCTOR_COMMIT; in nilfs_segctor_notify()
2383 sci->sc_seq_done = sci->sc_seq_accepted; in nilfs_segctor_notify()
2384 nilfs_segctor_wakeup(sci, err); in nilfs_segctor_notify()
2385 sci->sc_flush_request = 0; in nilfs_segctor_notify()
2388 sci->sc_flush_request &= ~FLUSH_FILE_BIT; in nilfs_segctor_notify()
2390 sci->sc_flush_request &= ~FLUSH_DAT_BIT; in nilfs_segctor_notify()
2392 /* re-enable timer if checkpoint creation was not done */ in nilfs_segctor_notify()
2393 if ((sci->sc_state & NILFS_SEGCTOR_COMMIT) && in nilfs_segctor_notify()
2394 time_before(jiffies, sci->sc_timer.expires)) in nilfs_segctor_notify()
2395 add_timer(&sci->sc_timer); in nilfs_segctor_notify()
2397 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_notify()
2401 * nilfs_segctor_construct - form logs and write them to disk
2402 * @sci: segment constructor object
2405 static int nilfs_segctor_construct(struct nilfs_sc_info *sci, int mode) in nilfs_segctor_construct() argument
2407 struct the_nilfs *nilfs = sci->sc_super->s_fs_info; in nilfs_segctor_construct()
2411 nilfs_segctor_accept(sci); in nilfs_segctor_construct()
2415 if (!nilfs_segctor_confirm(sci)) in nilfs_segctor_construct()
2416 err = nilfs_segctor_do_construct(sci, mode); in nilfs_segctor_construct()
2420 atomic_set(&nilfs->ns_ndirtyblks, 0); in nilfs_segctor_construct()
2421 if (test_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags) && in nilfs_segctor_construct()
2423 down_write(&nilfs->ns_sem); in nilfs_segctor_construct()
2424 err = -EIO; in nilfs_segctor_construct()
2425 sbp = nilfs_prepare_super(sci->sc_super, in nilfs_segctor_construct()
2429 err = nilfs_commit_super(sci->sc_super, in nilfs_segctor_construct()
2432 up_write(&nilfs->ns_sem); in nilfs_segctor_construct()
2436 nilfs_segctor_notify(sci, mode, err); in nilfs_segctor_construct()
2442 struct nilfs_sc_info *sci = from_timer(sci, t, sc_timer); in nilfs_construction_timeout() local
2444 wake_up_process(sci->sc_timer_task); in nilfs_construction_timeout()
2453 if (!test_bit(NILFS_I_UPDATED, &ii->i_state)) in nilfs_remove_written_gcinodes()
2455 list_del_init(&ii->i_dirty); in nilfs_remove_written_gcinodes()
2456 truncate_inode_pages(&ii->vfs_inode.i_data, 0); in nilfs_remove_written_gcinodes()
2457 nilfs_btnode_cache_clear(ii->i_assoc_inode->i_mapping); in nilfs_remove_written_gcinodes()
2458 iput(&ii->vfs_inode); in nilfs_remove_written_gcinodes()
2465 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_clean_segments()
2466 struct nilfs_sc_info *sci = nilfs->ns_writer; in nilfs_clean_segments() local
2467 struct nilfs_transaction_info ti; in nilfs_clean_segments() local
2470 if (unlikely(!sci)) in nilfs_clean_segments()
2471 return -EROFS; in nilfs_clean_segments()
2473 nilfs_transaction_lock(sb, &ti, 1); in nilfs_clean_segments()
2475 err = nilfs_mdt_save_to_shadow_map(nilfs->ns_dat); in nilfs_clean_segments()
2481 nilfs_mdt_restore_from_shadow_map(nilfs->ns_dat); in nilfs_clean_segments()
2485 sci->sc_freesegs = kbufs[4]; in nilfs_clean_segments()
2486 sci->sc_nfreesegs = argv[4].v_nmembs; in nilfs_clean_segments()
2487 list_splice_tail_init(&nilfs->ns_gc_inodes, &sci->sc_gc_inodes); in nilfs_clean_segments()
2490 err = nilfs_segctor_construct(sci, SC_LSEG_SR); in nilfs_clean_segments()
2491 nilfs_remove_written_gcinodes(nilfs, &sci->sc_gc_inodes); in nilfs_clean_segments()
2498 schedule_timeout(sci->sc_interval); in nilfs_clean_segments()
2501 int ret = nilfs_discard_segments(nilfs, sci->sc_freesegs, in nilfs_clean_segments()
2502 sci->sc_nfreesegs); in nilfs_clean_segments()
2512 sci->sc_freesegs = NULL; in nilfs_clean_segments()
2513 sci->sc_nfreesegs = 0; in nilfs_clean_segments()
2514 nilfs_mdt_clear_shadow_map(nilfs->ns_dat); in nilfs_clean_segments()
2519 static void nilfs_segctor_thread_construct(struct nilfs_sc_info *sci, int mode) in nilfs_segctor_thread_construct() argument
2521 struct nilfs_transaction_info ti; in nilfs_segctor_thread_construct() local
2523 nilfs_transaction_lock(sci->sc_super, &ti, 0); in nilfs_segctor_thread_construct()
2524 nilfs_segctor_construct(sci, mode); in nilfs_segctor_thread_construct()
2531 if (test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags)) in nilfs_segctor_thread_construct()
2532 nilfs_segctor_start_timer(sci); in nilfs_segctor_thread_construct()
2534 nilfs_transaction_unlock(sci->sc_super); in nilfs_segctor_thread_construct()
2537 static void nilfs_segctor_do_immediate_flush(struct nilfs_sc_info *sci) in nilfs_segctor_do_immediate_flush() argument
2541 spin_lock(&sci->sc_state_lock); in nilfs_segctor_do_immediate_flush()
2542 mode = (sci->sc_flush_request & FLUSH_DAT_BIT) ? in nilfs_segctor_do_immediate_flush()
2544 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_do_immediate_flush()
2547 nilfs_segctor_do_construct(sci, mode); in nilfs_segctor_do_immediate_flush()
2549 spin_lock(&sci->sc_state_lock); in nilfs_segctor_do_immediate_flush()
2550 sci->sc_flush_request &= (mode == SC_FLUSH_FILE) ? in nilfs_segctor_do_immediate_flush()
2552 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_do_immediate_flush()
2554 clear_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags); in nilfs_segctor_do_immediate_flush()
2557 static int nilfs_segctor_flush_mode(struct nilfs_sc_info *sci) in nilfs_segctor_flush_mode() argument
2559 if (!test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags) || in nilfs_segctor_flush_mode()
2560 time_before(jiffies, sci->sc_lseg_stime + sci->sc_mjcp_freq)) { in nilfs_segctor_flush_mode()
2561 if (!(sci->sc_flush_request & ~FLUSH_FILE_BIT)) in nilfs_segctor_flush_mode()
2563 else if (!(sci->sc_flush_request & ~FLUSH_DAT_BIT)) in nilfs_segctor_flush_mode()
2570 * nilfs_segctor_thread - main loop of the segment constructor thread.
2578 struct nilfs_sc_info *sci = (struct nilfs_sc_info *)arg; in nilfs_segctor_thread() local
2579 struct the_nilfs *nilfs = sci->sc_super->s_fs_info; in nilfs_segctor_thread()
2582 sci->sc_timer_task = current; in nilfs_segctor_thread()
2585 sci->sc_task = current; in nilfs_segctor_thread()
2586 wake_up(&sci->sc_wait_task); /* for nilfs_segctor_start_thread() */ in nilfs_segctor_thread()
2587 nilfs_info(sci->sc_super, in nilfs_segctor_thread()
2589 sci->sc_interval / HZ, sci->sc_mjcp_freq / HZ); in nilfs_segctor_thread()
2591 spin_lock(&sci->sc_state_lock); in nilfs_segctor_thread()
2596 if (sci->sc_state & NILFS_SEGCTOR_QUIT) in nilfs_segctor_thread()
2599 if (timeout || sci->sc_seq_request != sci->sc_seq_done) in nilfs_segctor_thread()
2601 else if (sci->sc_flush_request) in nilfs_segctor_thread()
2602 mode = nilfs_segctor_flush_mode(sci); in nilfs_segctor_thread()
2606 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_thread()
2607 nilfs_segctor_thread_construct(sci, mode); in nilfs_segctor_thread()
2608 spin_lock(&sci->sc_state_lock); in nilfs_segctor_thread()
2614 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_thread()
2616 spin_lock(&sci->sc_state_lock); in nilfs_segctor_thread()
2621 prepare_to_wait(&sci->sc_wait_daemon, &wait, in nilfs_segctor_thread()
2624 if (sci->sc_seq_request != sci->sc_seq_done) in nilfs_segctor_thread()
2626 else if (sci->sc_flush_request) in nilfs_segctor_thread()
2628 else if (sci->sc_state & NILFS_SEGCTOR_COMMIT) in nilfs_segctor_thread()
2630 sci->sc_timer.expires); in nilfs_segctor_thread()
2633 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_thread()
2635 spin_lock(&sci->sc_state_lock); in nilfs_segctor_thread()
2637 finish_wait(&sci->sc_wait_daemon, &wait); in nilfs_segctor_thread()
2638 timeout = ((sci->sc_state & NILFS_SEGCTOR_COMMIT) && in nilfs_segctor_thread()
2639 time_after_eq(jiffies, sci->sc_timer.expires)); in nilfs_segctor_thread()
2648 sci->sc_task = NULL; in nilfs_segctor_thread()
2649 wake_up(&sci->sc_wait_task); /* for nilfs_segctor_kill_thread() */ in nilfs_segctor_thread()
2650 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_thread()
2654 static int nilfs_segctor_start_thread(struct nilfs_sc_info *sci) in nilfs_segctor_start_thread() argument
2658 t = kthread_run(nilfs_segctor_thread, sci, "segctord"); in nilfs_segctor_start_thread()
2662 nilfs_err(sci->sc_super, "error %d creating segctord thread", in nilfs_segctor_start_thread()
2666 wait_event(sci->sc_wait_task, sci->sc_task != NULL); in nilfs_segctor_start_thread()
2670 static void nilfs_segctor_kill_thread(struct nilfs_sc_info *sci) in nilfs_segctor_kill_thread() argument
2671 __acquires(&sci->sc_state_lock) in nilfs_segctor_kill_thread()
2672 __releases(&sci->sc_state_lock) in nilfs_segctor_kill_thread()
2674 sci->sc_state |= NILFS_SEGCTOR_QUIT; in nilfs_segctor_kill_thread()
2676 while (sci->sc_task) { in nilfs_segctor_kill_thread()
2677 wake_up(&sci->sc_wait_daemon); in nilfs_segctor_kill_thread()
2678 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_kill_thread()
2679 wait_event(sci->sc_wait_task, sci->sc_task == NULL); in nilfs_segctor_kill_thread()
2680 spin_lock(&sci->sc_state_lock); in nilfs_segctor_kill_thread()
2685 * Setup & clean-up functions
2690 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_segctor_new()
2691 struct nilfs_sc_info *sci; in nilfs_segctor_new() local
2693 sci = kzalloc(sizeof(*sci), GFP_KERNEL); in nilfs_segctor_new()
2694 if (!sci) in nilfs_segctor_new()
2697 sci->sc_super = sb; in nilfs_segctor_new()
2700 sci->sc_root = root; in nilfs_segctor_new()
2702 init_waitqueue_head(&sci->sc_wait_request); in nilfs_segctor_new()
2703 init_waitqueue_head(&sci->sc_wait_daemon); in nilfs_segctor_new()
2704 init_waitqueue_head(&sci->sc_wait_task); in nilfs_segctor_new()
2705 spin_lock_init(&sci->sc_state_lock); in nilfs_segctor_new()
2706 INIT_LIST_HEAD(&sci->sc_dirty_files); in nilfs_segctor_new()
2707 INIT_LIST_HEAD(&sci->sc_segbufs); in nilfs_segctor_new()
2708 INIT_LIST_HEAD(&sci->sc_write_logs); in nilfs_segctor_new()
2709 INIT_LIST_HEAD(&sci->sc_gc_inodes); in nilfs_segctor_new()
2710 INIT_LIST_HEAD(&sci->sc_iput_queue); in nilfs_segctor_new()
2711 INIT_WORK(&sci->sc_iput_work, nilfs_iput_work_func); in nilfs_segctor_new()
2712 timer_setup(&sci->sc_timer, nilfs_construction_timeout, 0); in nilfs_segctor_new()
2714 sci->sc_interval = HZ * NILFS_SC_DEFAULT_TIMEOUT; in nilfs_segctor_new()
2715 sci->sc_mjcp_freq = HZ * NILFS_SC_DEFAULT_SR_FREQ; in nilfs_segctor_new()
2716 sci->sc_watermark = NILFS_SC_DEFAULT_WATERMARK; in nilfs_segctor_new()
2718 if (nilfs->ns_interval) in nilfs_segctor_new()
2719 sci->sc_interval = HZ * nilfs->ns_interval; in nilfs_segctor_new()
2720 if (nilfs->ns_watermark) in nilfs_segctor_new()
2721 sci->sc_watermark = nilfs->ns_watermark; in nilfs_segctor_new()
2722 return sci; in nilfs_segctor_new()
2725 static void nilfs_segctor_write_out(struct nilfs_sc_info *sci) in nilfs_segctor_write_out() argument
2734 struct nilfs_transaction_info ti; in nilfs_segctor_write_out() local
2736 nilfs_transaction_lock(sci->sc_super, &ti, 0); in nilfs_segctor_write_out()
2737 ret = nilfs_segctor_construct(sci, SC_LSEG_SR); in nilfs_segctor_write_out()
2738 nilfs_transaction_unlock(sci->sc_super); in nilfs_segctor_write_out()
2740 flush_work(&sci->sc_iput_work); in nilfs_segctor_write_out()
2742 } while (ret && ret != -EROFS && retrycount-- > 0); in nilfs_segctor_write_out()
2746 * nilfs_segctor_destroy - destroy the segment constructor.
2747 * @sci: nilfs_sc_info
2753 static void nilfs_segctor_destroy(struct nilfs_sc_info *sci) in nilfs_segctor_destroy() argument
2755 struct the_nilfs *nilfs = sci->sc_super->s_fs_info; in nilfs_segctor_destroy()
2758 up_write(&nilfs->ns_segctor_sem); in nilfs_segctor_destroy()
2760 spin_lock(&sci->sc_state_lock); in nilfs_segctor_destroy()
2761 nilfs_segctor_kill_thread(sci); in nilfs_segctor_destroy()
2762 flag = ((sci->sc_state & NILFS_SEGCTOR_COMMIT) || sci->sc_flush_request in nilfs_segctor_destroy()
2763 || sci->sc_seq_request != sci->sc_seq_done); in nilfs_segctor_destroy()
2764 spin_unlock(&sci->sc_state_lock); in nilfs_segctor_destroy()
2766 if (flush_work(&sci->sc_iput_work)) in nilfs_segctor_destroy()
2769 if (flag || !nilfs_segctor_confirm(sci)) in nilfs_segctor_destroy()
2770 nilfs_segctor_write_out(sci); in nilfs_segctor_destroy()
2772 if (!list_empty(&sci->sc_dirty_files)) { in nilfs_segctor_destroy()
2773 nilfs_warn(sci->sc_super, in nilfs_segctor_destroy()
2775 nilfs_dispose_list(nilfs, &sci->sc_dirty_files, 1); in nilfs_segctor_destroy()
2778 if (!list_empty(&sci->sc_iput_queue)) { in nilfs_segctor_destroy()
2779 nilfs_warn(sci->sc_super, in nilfs_segctor_destroy()
2781 nilfs_dispose_list(nilfs, &sci->sc_iput_queue, 1); in nilfs_segctor_destroy()
2784 WARN_ON(!list_empty(&sci->sc_segbufs)); in nilfs_segctor_destroy()
2785 WARN_ON(!list_empty(&sci->sc_write_logs)); in nilfs_segctor_destroy()
2787 nilfs_put_root(sci->sc_root); in nilfs_segctor_destroy()
2789 down_write(&nilfs->ns_segctor_sem); in nilfs_segctor_destroy()
2791 timer_shutdown_sync(&sci->sc_timer); in nilfs_segctor_destroy()
2792 kfree(sci); in nilfs_segctor_destroy()
2796 * nilfs_attach_log_writer - attach log writer
2806 * %-ENOMEM - Insufficient memory available.
2810 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_attach_log_writer()
2813 if (nilfs->ns_writer) { in nilfs_attach_log_writer()
2815 * This happens if the filesystem is made read-only by in nilfs_attach_log_writer()
2823 nilfs->ns_writer = nilfs_segctor_new(sb, root); in nilfs_attach_log_writer()
2824 if (!nilfs->ns_writer) in nilfs_attach_log_writer()
2825 return -ENOMEM; in nilfs_attach_log_writer()
2827 inode_attach_wb(nilfs->ns_bdev->bd_inode, NULL); in nilfs_attach_log_writer()
2829 err = nilfs_segctor_start_thread(nilfs->ns_writer); in nilfs_attach_log_writer()
2837 * nilfs_detach_log_writer - destroy log writer
2845 struct the_nilfs *nilfs = sb->s_fs_info; in nilfs_detach_log_writer()
2848 down_write(&nilfs->ns_segctor_sem); in nilfs_detach_log_writer()
2849 if (nilfs->ns_writer) { in nilfs_detach_log_writer()
2850 nilfs_segctor_destroy(nilfs->ns_writer); in nilfs_detach_log_writer()
2851 nilfs->ns_writer = NULL; in nilfs_detach_log_writer()
2856 spin_lock(&nilfs->ns_inode_lock); in nilfs_detach_log_writer()
2857 if (!list_empty(&nilfs->ns_dirty_files)) { in nilfs_detach_log_writer()
2858 list_splice_init(&nilfs->ns_dirty_files, &garbage_list); in nilfs_detach_log_writer()
2862 spin_unlock(&nilfs->ns_inode_lock); in nilfs_detach_log_writer()
2863 up_write(&nilfs->ns_segctor_sem); in nilfs_detach_log_writer()